6 yr old hen squirting blue/green poop Please advise!!!!

My hen has been looking thinner lately, has been having weird green poop, solid but now liquid! The only things I see her eat are BOSS and corn. It's been too cold to stand outside all day to see if she eats the flock raiser or not. I'm going to bring her inside this eve. What should I feed her? What else does she need?
I have:
Corid
Oxytetracycline
ACV
medicated chick starter
wazine17
I get paid tomorrow and can go to TSC and drug store for anything else.
Please, please help, I love her.....